“I’m more cautious,” one rider, Eugenia Ramos, 57, of Bay Ridge, said as she waited for a subway train in Brooklyn. “You never know who is around you. I’m constantly looking around.”

Emily Valle, 22, of Brownsville, Brooklyn, said she is no longer sleeping on the train.

“Don’t do that,” she advised, “and don’t listen to music.”

Lamar Terrell, 31, of Downtown Brooklyn, said he won’t be catching Z’s on the train, either.

“I’m more alert and aware of my surroundings and just more conscious of what’s going on I’m just trying to stay safe,’’ he said.

Straphangers also blasted Police Commissioner Bill Bratton and other NYPD officials for touting MTA safety after the slashings, which included one attack allegedly by a man whose photo appeared on Thursday’s Post.

“They are ridiculous to say that,” said Deborah Figueroa, 42, of Harlem. “Of course, it’s safe when you are the police chief and you’re traveling around with your whole crew.”